Donkey Calf Raise attachment Quick ConnectBlind

in Mechanical Engineering held by Achilles
Contest Ended, Winner(s) have been selected.
Description:
This contest is to design a fast way to connect and disconnect the Donkey Calf Raise attachment to various size smith machine barbell shafts. The Donkey Calf Raise attachment is a patented apparatus that can be attached to the smith machine barbell to perform the donkey calf raise exercise. The current design will not attach to all smith machine barbell shafts. I need a new quick way for the apparatus to attach to a 25mm to 35mm diameter smith machine barbell shaft.

Please see attached 3D STEP file, Inventor assembly & part files and AutoCAD 3D file. Attached also are images on how to perform the donkey calf raise exercise.
Wants:
• A quick connect and disconnect to a smith machine barbell shaft
• Commercial grade construction
• Must be very durable to withstand constant use
• Modern looking design
• It should be able to fit 25mm to 35mm diameter smith machine barbell shafts.
• Material: Aluminum
• All Designs will be 3D Solid Models
Don't Wants:
• Do not change the overall design; just change the way it connects to the smith machine barbell
• We do not want overly complex designs that are difficult to manufacture. Keep it simple
Software:
  1. Software that can be used: • Autodesk Inventor, Pro Engineer, SolidWorks, Solid Edge, Catia, Unigraphics

Entries

1st Winner
#64 Donkey Calf Raise attachment Quick Connect AD002 - by Adriano Barissa by Adriano Ordoz Barissa
new model with quick fastening system
more
May 27, 2019 1:41
#51 Donkey Calf Raise with bit longer presing piece by walxo
May 23, 2019 16:38
#59 Donkey Calf Raise attachment Quick Connect - by Adriano Ordoz Barissa by Adriano Ordoz Barissa
I tried to make a simple system for the construction of aluminum parts.
The fastening is fast and adapts to any bar diameter.
more
May 25, 2019 13:52
#15 Donkey Calf Raise attachment Quick Connect by REDA
;)
more
May 5, 2019 16:38
#45 Design No. 02 by ahmadnazree
Hi Contest Holder, please find the attached model and the mechanism description for your review. Thank you very much.
more
May 23, 2019 7:11
#46 DCRA Quick Release & Connect (25mm-35mm Bars) by Tom Garwood
Based on your design requirements I have amended the design to enable quick connect and disconnect from a range of Smith Machine Barbell Diameters (25mm-35mm). Based on the gym operating environment I have used a robust design that is simple to use.
Please let me know if you have any further queries or feedback regarding the design.
Kind Regards
Tom
more
May 23, 2019 9:28
#48 Donkey_Calf_Raise_attachment_Assembly -dismountable compound by walxo
May 23, 2019 11:10
#50 Donkey Calf Raise with barbells protector STEP by walxo
May 23, 2019 14:24
#57 Redesign of entry no. 03 by ahmadnazree
Hi CH, please find the attached, the modified design for entry no. 03. Thank you very much.
more
May 24, 2019 16:29
#67 Donkey Calf Rise Two point Pressing by walxo
May 27, 2019 9:28
#68 Donkey Calf Rise -2 points pressing - video by walxo
Intel IYUV codec
Open it with VLC(or other )player
more
May 27, 2019 10:37
#74 Very simple adaptive design for any bar. by walxo
May 28, 2019 11:22
#2 RapidClamp by Bruno CADET
Hi,
Here's a rapid clamp model that I hope you will like.
It can be made by 3D Print in solid material such as Nylon or PET.
If not, it can be manufactured by milling metal (I can generate tool path for that).
The metal clip acts as a spring and the system is self-locking.
You just have to slightly machine the base
All my work is done in parametric mode. Made on Autodesk Fusion360 all models are compatibles Inventor, Solidworks etc... Exports can be done in format : STEP, IGES, SAT etc...
I remain to your disposal.
Bruno.
more
Apr 29, 2019 16:36
#5 RAPID CLAMP II by Bruno CADET
New plate and clamp.
Seals are manufactured in PTFE or POM.
more
Apr 30, 2019 14:01
#7 DCRA by andry
Hello
i've Modified a Clamping unit - easy to use for connect and disconnect shaft .
Seal Rubber Need Change over from Diameter 25 and Diameter 35.
more
May 2, 2019 13:38
#8 Donkey Calf Raise attachment Quick Connect by REDA
;)
more
May 2, 2019 21:23
#9 DCRA _rev_01 by andry
Update design with Clamping Eccentric
more
May 3, 2019 3:24
#12 Clamper eccentric by Trie
May 4, 2019 18:14
#13 Donkey Calf Raise attachment Quick Connect by REDA
;)
more
May 4, 2019 20:22
#14 Donkey_Calf_Raise_Model_fast_clamp_method by Trie
Improved from previous designs
more
May 5, 2019 4:50
#21 DCRA QUICK CONNECT ASSEMBLY_1.STEP by Yohanes Ujang
PLease check the 2nd concept
more
May 6, 2019 11:53
#35 Donkey Calf Raise attachment Quick Connect by REDA
;)
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May 18, 2019 23:45
#37 Donkey Calf Raise attachment Quick Connect by REDA
:)
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May 19, 2019 21:05
#41 Design No. 01 by ahmadnazree
Hi Contest Holder, please find the attached model and the mechanism description for your review. Thank you very much.
more
May 21, 2019 19:09
#53 Design No. 03 by ahmadnazree
Hi Contest Holder, please find the attached model and the mechanism description for your review. Thank you very much.
more
May 23, 2019 19:24
#55 Design No. 03 Modified by ahmadnazree
Hi CH, please find the modification on design no. 03. Thank you very much.
more
May 24, 2019 3:16
#61 DCRA V1.0 by KP HARISANKAR
Feedbacks are welcome.
more
May 26, 2019 18:58
#63 Donkey Calf Raise attachment Quick Connect - Practical by sherifelsheikh
Suitable for 25 mm to 35 mm
more
May 26, 2019 22:31
#1 Donkey_Assembly_neu by Michael M
Fastening mechanism in the form of two hooks. Hooks are equipped with latches. This design is easily removable.
more
Apr 29, 2019 15:12
#4 DCRA Bar Adapter by Chris Brennan
Adapters for fitting to the existing attachment to accommodate 25mm and 35mm bars.
more
Apr 30, 2019 12:00
#6 DCRA ATTACHMENT FOR 35mm TO 25mm BARS by LickuidCAD
Hello,
As per your instructions, I have modified only the clasping mechanism of the DCRA to meet your requirements. The connections to the main body of the equipment have remained the same, i.e the same screws, bolts and locking mechanism can be used as the original.
As can be seen from the images I've attached, the changes all lie and are limited to the area which will clasp the 35mm and 25mm bars.
Hope you find this design to your satisfaction, and your feedback is highly appreciated and modifications can be made if required. Please also note I can provide the design file in .stl (3D Printing), .stp (STEP) and also in formats compatible with AutoCAD, Solidworks etc.
Have a good day!
Kesigan.
more
May 1, 2019 23:20
#10 DCRA QUICK CONNECT ASSEMBLY by Yohanes Ujang
Please take a look on the word files attached. I think this is an good design and doable.
more
May 3, 2019 18:59
#16 Amovibles seals by Bruno CADET
PTFE or POM seals are mandatory to not damage the barbell. Here's a solution with amovible seals. 35mm seals are fixed. 25mm are amovibles and authorize the shaft radial loading.
more
May 5, 2019 18:32
#18 Calf attachment design 1 by NabilZer
Hi
this is my first submission for the calf attachment design
regards
more
May 5, 2019 21:28
#19 DCR Quick Connect to Smith Machine Barbells with different diameters. by LickuidCAD
Hello,
Please find attached my updated design as per your most recent design requirements. The DCR can be snapped into place on the barbels and the locking mechanism is simple, durable and safe.
Your feedback is appreciated.
Thank you.
more
May 5, 2019 22:37
#20 modification for clasping a range of barbell diameters by Jeremy Benjamin
I've organized my 3D CAD files and drawing files (and an animation video clip demonstrating my idea visually) into a Google Drive folder which will be easier to navigate than uploading files here; pasting a link to it below.
Note that this design is not fully polished and functional in its present state, it is a pitch of a concept that would require some additional work - and practical experimentation - to make it viable, I'm just offering it here to see if the concept interests you, if you'd be interested in developing it further, and if it's unique from your other submissions. The PDF drawing in the sub-folder outlines exactly what is missing and what would be required to take it further. Note that the "base" part you uploaded had some technical issues, when I pulled it up in SolidWorks I was unable to make alterations to that one part, but I was able to leverage the other components.
Here is the Google Drive folder with my design:
https://drive.google.com/open?id=1fEms8CPMVRjx9uP9bjDGkCq-4b-z8blP
more
May 6, 2019 5:44
#24 DONKEY DESIGN Mechanism by Steven INA
Hi Achilles Official. This is the concept that i thought the best way to make your project look much simple, easier, and etc. Awaiting your feedback, hope you like this mechanism concept.
Best Regard
Steven
more
May 8, 2019 13:49
#25 SHAFTS ADAPTER by Bruno CADET
A new idea to accept all shafts between 25 to 35mm.
An another mechanism will come to block the system whith only one command.
.
more
May 9, 2019 22:30

Discussion

Mon, 20 May 2019 20:16:01 +0000
Hey CH,
Regarding the interface between the shaft and the DCRA connection, does the DCRA rotate around the shaft or will it be fixed i.e not rotate at all? Thanks.

Achilles

Buyer

Sun, 19 May 2019 05:54:49 +0000
Designer, I have received some good designs but nothing that I would call a winner yet. Let’s keep in mind what this device will be used for. It will be used in a commercial gym. This means that the device will be used quite often and it must be very durable. Also, the attachment clamp must be easy to take off and on the barbell. It must be able to clamp around a 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, and 35mm barbell shaft.
You must also think about how this device will be manufactured.

Achilles

Buyer

Wed, 08 May 2019 15:40:17 +0000
There is also A 3D STEP file attached.

Abid Yusuf

Designer

Wed, 08 May 2019 13:30:57 +0000
can you please upload the files with an extension other than .ipt, solidworks is having trouble identifying the files.

Achilles

Buyer

Tue, 07 May 2019 15:28:48 +0000
Designers, the new design must be able to attach to 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm, 32mm, 33mm, 34mm and 35mm barbell shafts.

Achilles

Buyer

Sat, 04 May 2019 15:43:55 +0000
Designers,
I want the new connection design to be quick. No threads. Threads take too long to take off and on.

Fadi Sayegh

Designer

Wed, 01 May 2019 13:05:02 +0000
could you upload all fill that you attachment than I can open them on SOLIDWORKS. some files need inventor software to open

Achilles

Buyer

Tue, 30 Apr 2019 13:26:34 +0000
rhınoceros can work
Tue, 30 Apr 2019 13:15:04 +0000
ıs rhınoceros work ?
Tue, 30 Apr 2019 04:13:27 +0000
The specification 25mm to 35mm barbell... am I to understand that there are only 2 sizes, 25 and 35? or are there sizes in between?
Tue, 30 Apr 2019 03:18:41 +0000
Hi, must the clamp tightly grip the barbell shaft? I measure the current design diameter is 28mm.

Achilles

Buyer

Mon, 29 Apr 2019 21:20:24 +0000
Designers please make sure that your design quick connect will accommodate a 25mm to 35mm diameter smith machine barbell shaft.

Thanks,
Fabian

Achilles

Buyer

Mon, 29 Apr 2019 17:23:12 +0000
Designers, when submitting ideas; please submit JPG images.

Thanks,
Fabian

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